【摘要】 通过室温压缩实验,研究了奥氏体不锈钢302HQA的冷变形行为,组织分析和X射线衍射分析表明,冷变形过程产生了形变马氏体,进一步磁性检测表明:随着变形量的增加,形变马氏体的量也增加;在小变形条件下,变形速率对形变马氏体的生成量影响较小;当变形量增加到50％时,随着变形速率的增加,由于变形热效应的影响,形变马氏体含量反而有所下降。更多还原

【Abstract】 The cold deformation behavior of 302HQA stainless steel was systematically investigated through compress tests at room temperature. By means of microstructure and X-ray diffraction analysis, deformation-induced martensite transformation (DIMT) was found in this alloy during the cold forming process. The result of magnetic measurement shows that the amount of deformation-induced martensite increases with the increasing of plastic strain. When the plastic strain is lower than 30%, the amount of martensite increases with the increasing of strain rate, while the plastic strain is up to 50%, the amount of deformation-induced martensite decreases with the increasing of strain rate due to the effect of deformation-induced heat accumulation.更多还原